Two, three, or Quad-band GSM phone?
Quad-band GSM cell phone - as this great Motorola V600 - are becoming more common and cheaper.
A growing number of mobile phone Quad-band should be your first choice for mobile devices.
Part 5 of 8 Series - First part of two to eight clicks 5674
The two frequency bands for GSM services in the United States. Two bands GSM service provider worldwide.
Ideally, you want a mobile phone can be divided into four lanes - also known as Quad-band phone. However, there is one more rare and expensive.
If you opt for Tri-band GSM as the second best choice, it is necessary to focus on the three stripes on the phone. Some groups are more useful than others, depending on your travel.
What is it?
To use mobile phones to transmission of radio waves meeting. These radio waves with different frequencies, like radio stations with different frequencies.
For example, if you just listen to FM radio stations, they are in the VHF band (of course!) If between 88-108 MHz. If you just listen to AM, AM radio frequency range from 0.55 to 1.6 MHz.
This is interesting to different frequencies for different types of services to broadcasting.
Frequency of use on a mobile phone in four different frequency ranges:
850 MHz (824.2 - 848.8 MHz Tx; 869,2 - 893,8 MHz downlink)
900 MHz (880-2 - 914.8 MHz Tx; 925,2 - 959,8 MHz downlink)
1800 MHz (from 1710.2 to 1784.8 MHz, 1805.2 to 1879.8 MHz input)
1900 MHz (from 1850.2 to 1909.8 MHz, 1930.2 to 1989.8 MHz input)
Despite the fact that the 850 and 900, and 1800 and 1900 is very close to the phone, in the working group, unfortunately, that this group can not work if they are, as one of the additional bands. On the other hand, if you have an FM-tuner, radio 98.1 MHz, it is not possible, you can hear what is happening on another radio to 98.3 MHz if you RETUNE radio.
What is the frequency of use in the United States?
First, only in the United States in the 2000 MHz GSM phone service. In the past year we have witnessed a growing number of GSM 850 MHz. This service in general, than in rural areas, because at 850 MHz is important, which is 1900 MHz. Sometimes, even in urban areas, especially if the phone is in the unused frequencies of 850 MHz frequency range, but not for the remainder of 1900 MHz.
Most of the 850 MHz service AT & T, Cingular, and some of them (the two companies, the merger). Despite the fact that T - Mobile's (July 4) has its own 850 MHz, because it is a roaming agreement with AT & T and Cingular, and T - Mobile users can be found in some areas, one is a 850 MHz signal.
What is 800 MHz? This is the fifth?
Some people refer to the 850 MHz to 800 MHz. This is not correct. Near the frequency of 850 MHz and the standard designations adopted in the GSM Association the'850 MHz.
If you have a person on the quad band cell phone, 800 MHz service, they are simply wrong in May, ie 850 MHz.
The frequency should be in the United States?
This issue depends on the areas where your cell phone. If you live in a large area of the city you are in May, 850 MHz, but if you are traveling in a secondary school on a regular basis, 850 MHz coverage with additional valuable.
In the future, we tend to see more and more to use the 850 MHz GSM coverage throughout the country.
Then the eyes of the future, probably in 1900, we have a repetition of 850 MHz band.
At the end of the line: If you travel to major cities, using mobile communications, 850 MHz and 1900 MHz.
This is often at the international level?
GSM was originally developed in Europe, most recently in the United States.
First, all countries use the GSM 900 MHz service. In recent years, vendors have been more and more to grow in the years 1800 MHz, as a result of overcrowding in the 900 MHz.
If the United States began to GSM in a number of other countries that have very close ties with the copy in the United States and the United States decided that the same frequency, the United States to use - first in 1900, and in some cases, from 850 MHz .
Almost without exception, all countries in the international non-US international frequency bands 900 MHz service, and many of the services of 1800 MHz.
All the countries in the U.S. 1900 MHz services. Very few Mai to 850 MHz service.
Frequency, you will need to travel?
It depends on the country.
Please refer to the table below to create the impression that the use of the belt. For contemporary information, complete map coverage of the network, based on the GSM Association on the official website.
The table below bandwidth 900 MHz is the most common use of the international community. 1800 MHz, you will cover the country is 900 MHz. Only in 1900 in some countries, up to 900 or 1800 MHz.
Keep in mind that these two countries, 900 and 1800 MHz, to improve coverage in the 900-MHz to rule that the 1800 MHz.
How does your group on the quad band?
If only in the United States
If you plan on your phone, not only in the United States, and then double-band phone with 850 MHz and 1900 MHz.
Mono-frequency 1900 MHz mobile phone, as well as covers.
If only using
If you plan on your phone, not only in the international arena, and only then decide on the advisability of the phone for international use of the spectrum, either in the country, the prevalence in the United States, or both.
If you need only use the phone, national and international frequencies 900/1800 MHz telephone access. Only mono-frequency GSM 900 MHz, quite good, but most of the phone these days with.
If you use the phone, so that the United States, 1900 MHz, Tri-band 900/1800/1900 MHz phone.
If it's in the United States and internationally
Two frequencies of "significant" frequencies - 900 and 1900 MHz. In the other two have a good team, and 1800 MHz, as open to foreign countries for more than 850 MHz in the United States.
Ideally, the best solution is the fact that Quad-band GSM all four bands.
So why not buy a quad band GSM?
If we are in the 4 th July, we said: "Only a very small number of Quad-band GSM sales, while they are often expensive. Fortunately, nine months later, Quad-band phone is much more common, and practically free from May If you have a demand for new services.
We found that the cheapest new phony transactions, typically those who are willing to Amazon - they appear on the left side (they have more models on the site, too). Strange that the price of advertising in the Amazon are often substantially higher than the actual price after the offer on the site - for example, today (5 March), a beautiful poster of the Motorola V551 74, 99 dollars, but clicking on its website after the presentation You get free room and liquidity 75,1 ○ back!
We already know about the continuation of Quad-band GSM (if you're with other Quad-band GSM, please notify us so we can update the list)
Geography
GC688
Hewlett-Packard
i6315
Motorola
A780
RAZR V3 (the use of magic, but not V300)
V180 (Note - Some people point out that Cingular
1800 banned the group, but in theory
These phones should include a series of four)
V220
V330
V400
V500 / V501 / V505 / V525 / V551 / V555
Mobile phone V600 / V620
NEC Corporation
515/525
Palm
All 600/650
Sharp
GX32
In XDA
Illegal immigrants
Caution: T - Mobile disabilities in the band 850 MHz Quad band GSM sales / marketing. In September 2005, it seems that most of the Quad-band GSM, it will be all four of the opening band, but if the old T - Mobile Quad-Band GSM, in order to provide support for all four frequency bands.
Please note - different definitions, Tri-band GSM '
All three band GSM rate (?) To support the three frequencies. Nevertheless, they have several options in May, into three groups, their support.
These two changes are as follows:
900/1800/1900 - Excellent very well internationally and in United States
850/1800/1900 - Very good, but not very good for the United States, International
But hurry - for 5 hours to 6 hours with the phone?
Mobile phones, to support the new High Speed Data Transmission - G called'3, what organization (such as the "third generation") tend to have high-speed mobile data services in the region, in the 2100 MHz typical.
High speed data processing market is still in the design, there are several different technologies, each of which is none other miscellaneous services. We remark that, when the issue of 3G in the stability of things clear.
In October 2005, one fifth of the population, the role of developing countries in the frequency range of 450 MHz. What are the least developed countries - the biggest advantage is that the provision of a range of more than 450 MHz, thereby creating a small network will cover the tower and can be implemented at lower cost.
Other hand, from a mobile phone with a 450 MHz may require a longer period of time in the air, because the faster than the wavelength - the need, in the air, twice the length of the air at 900 MHz and 4 times the length of 1800 MHz air, similar effect.
Because at the time of writing, Nokia and Sony Ericsson announced that the mobile phone to support this new group, but no plans providers around the world began to develop 450 MHz网络. If (when) he felt they were very well that in May in the third world.
Abstract
There is one simple answer to the question, what should my GSM support group? . The answer lies in the fact that all four. "
But in the limited and high cost, many people are most likely to choose the three-band GSM. If yes, then three lanes for you works best when applied to the phone, mostly in the United States and international organizations.
Quad-band GSM cell phone - as this great Motorola V600 - are becoming more common and cheaper.
A growing number of mobile phone Quad-band should be your first choice for mobile devices.
Part 5 of 8 Series - First part of two to eight clicks 5674
The two frequency bands for GSM services in the United States. Two bands GSM service provider worldwide.
Ideally, you want a mobile phone can be divided into four lanes - also known as Quad-band phone. However, there is one more rare and expensive.
If you opt for Tri-band GSM as the second best choice, it is necessary to focus on the three stripes on the phone. Some groups are more useful than others, depending on your travel.
What is it?
To use mobile phones to transmission of radio waves meeting. These radio waves with different frequencies, like radio stations with different frequencies.
For example, if you just listen to FM radio stations, they are in the VHF band (of course!) If between 88-108 MHz. If you just listen to AM, AM radio frequency range from 0.55 to 1.6 MHz.
This is interesting to different frequencies for different types of services to broadcasting.
Frequency of use on a mobile phone in four different frequency ranges:
850 MHz (824.2 - 848.8 MHz Tx; 869,2 - 893,8 MHz downlink)
900 MHz (880-2 - 914.8 MHz Tx; 925,2 - 959,8 MHz downlink)
1800 MHz (from 1710.2 to 1784.8 MHz, 1805.2 to 1879.8 MHz input)
1900 MHz (from 1850.2 to 1909.8 MHz, 1930.2 to 1989.8 MHz input)
Despite the fact that the 850 and 900, and 1800 and 1900 is very close to the phone, in the working group, unfortunately, that this group can not work if they are, as one of the additional bands. On the other hand, if you have an FM-tuner, radio 98.1 MHz, it is not possible, you can hear what is happening on another radio to 98.3 MHz if you RETUNE radio.
What is the frequency of use in the United States?
First, only in the United States in the 2000 MHz GSM phone service. In the past year we have witnessed a growing number of GSM 850 MHz. This service in general, than in rural areas, because at 850 MHz is important, which is 1900 MHz. Sometimes, even in urban areas, especially if the phone is in the unused frequencies of 850 MHz frequency range, but not for the remainder of 1900 MHz.
Most of the 850 MHz service AT & T, Cingular, and some of them (the two companies, the merger). Despite the fact that T - Mobile's (July 4) has its own 850 MHz, because it is a roaming agreement with AT & T and Cingular, and T - Mobile users can be found in some areas, one is a 850 MHz signal.
What is 800 MHz? This is the fifth?
Some people refer to the 850 MHz to 800 MHz. This is not correct. Near the frequency of 850 MHz and the standard designations adopted in the GSM Association the'850 MHz.
If you have a person on the quad band cell phone, 800 MHz service, they are simply wrong in May, ie 850 MHz.
The frequency should be in the United States?
This issue depends on the areas where your cell phone. If you live in a large area of the city you are in May, 850 MHz, but if you are traveling in a secondary school on a regular basis, 850 MHz coverage with additional valuable.
In the future, we tend to see more and more to use the 850 MHz GSM coverage throughout the country.
Then the eyes of the future, probably in 1900, we have a repetition of 850 MHz band.
At the end of the line: If you travel to major cities, using mobile communications, 850 MHz and 1900 MHz.
This is often at the international level?
GSM was originally developed in Europe, most recently in the United States.
First, all countries use the GSM 900 MHz service. In recent years, vendors have been more and more to grow in the years 1800 MHz, as a result of overcrowding in the 900 MHz.
If the United States began to GSM in a number of other countries that have very close ties with the copy in the United States and the United States decided that the same frequency, the United States to use - first in 1900, and in some cases, from 850 MHz .
Almost without exception, all countries in the international non-US international frequency bands 900 MHz service, and many of the services of 1800 MHz.
All the countries in the U.S. 1900 MHz services. Very few Mai to 850 MHz service.
Frequency, you will need to travel?
It depends on the country.
Please refer to the table below to create the impression that the use of the belt. For contemporary information, complete map coverage of the network, based on the GSM Association on the official website.
The table below bandwidth 900 MHz is the most common use of the international community. 1800 MHz, you will cover the country is 900 MHz. Only in 1900 in some countries, up to 900 or 1800 MHz.
Keep in mind that these two countries, 900 and 1800 MHz, to improve coverage in the 900-MHz to rule that the 1800 MHz.
How does your group on the quad band?
If only in the United States
If you plan on your phone, not only in the United States, and then double-band phone with 850 MHz and 1900 MHz.
Mono-frequency 1900 MHz mobile phone, as well as covers.
If only using
If you plan on your phone, not only in the international arena, and only then decide on the advisability of the phone for international use of the spectrum, either in the country, the prevalence in the United States, or both.
If you need only use the phone, national and international frequencies 900/1800 MHz telephone access. Only mono-frequency GSM 900 MHz, quite good, but most of the phone these days with.
If you use the phone, so that the United States, 1900 MHz, Tri-band 900/1800/1900 MHz phone.
If it's in the United States and internationally
Two frequencies of "significant" frequencies - 900 and 1900 MHz. In the other two have a good team, and 1800 MHz, as open to foreign countries for more than 850 MHz in the United States.
Ideally, the best solution is the fact that Quad-band GSM all four bands.
So why not buy a quad band GSM?
If we are in the 4 th July, we said: "Only a very small number of Quad-band GSM sales, while they are often expensive. Fortunately, nine months later, Quad-band phone is much more common, and practically free from May If you have a demand for new services.
We found that the cheapest new phony transactions, typically those who are willing to Amazon - they appear on the left side (they have more models on the site, too). Strange that the price of advertising in the Amazon are often substantially higher than the actual price after the offer on the site - for example, today (5 March), a beautiful poster of the Motorola V551 74, 99 dollars, but clicking on its website after the presentation You get free room and liquidity 75,1 ○ back!
We already know about the continuation of Quad-band GSM (if you're with other Quad-band GSM, please notify us so we can update the list)
Geography
GC688
Hewlett-Packard
i6315
Motorola
A780
RAZR V3 (the use of magic, but not V300)
V180 (Note - Some people point out that Cingular
1800 banned the group, but in theory
These phones should include a series of four)
V220
V330
V400
V500 / V501 / V505 / V525 / V551 / V555
Mobile phone V600 / V620
NEC Corporation
515/525
Palm
All 600/650
Sharp
GX32
In XDA
Illegal immigrants
Caution: T - Mobile disabilities in the band 850 MHz Quad band GSM sales / marketing. In September 2005, it seems that most of the Quad-band GSM, it will be all four of the opening band, but if the old T - Mobile Quad-Band GSM, in order to provide support for all four frequency bands.
Please note - different definitions, Tri-band GSM '
All three band GSM rate (?) To support the three frequencies. Nevertheless, they have several options in May, into three groups, their support.
These two changes are as follows:
900/1800/1900 - Excellent very well internationally and in United States
850/1800/1900 - Very good, but not very good for the United States, International
But hurry - for 5 hours to 6 hours with the phone?
Mobile phones, to support the new High Speed Data Transmission - G called'3, what organization (such as the "third generation") tend to have high-speed mobile data services in the region, in the 2100 MHz typical.
High speed data processing market is still in the design, there are several different technologies, each of which is none other miscellaneous services. We remark that, when the issue of 3G in the stability of things clear.
In October 2005, one fifth of the population, the role of developing countries in the frequency range of 450 MHz. What are the least developed countries - the biggest advantage is that the provision of a range of more than 450 MHz, thereby creating a small network will cover the tower and can be implemented at lower cost.
Other hand, from a mobile phone with a 450 MHz may require a longer period of time in the air, because the faster than the wavelength - the need, in the air, twice the length of the air at 900 MHz and 4 times the length of 1800 MHz air, similar effect.
Because at the time of writing, Nokia and Sony Ericsson announced that the mobile phone to support this new group, but no plans providers around the world began to develop 450 MHz网络. If (when) he felt they were very well that in May in the third world.
Abstract
There is one simple answer to the question, what should my GSM support group? . The answer lies in the fact that all four. "
But in the limited and high cost, many people are most likely to choose the three-band GSM. If yes, then three lanes for you works best when applied to the phone, mostly in the United States and international organizations.
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